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# Description * I was dismayed to discover recently that UnsupportedInput and TypeMismatch are used *extremely* inconsistently across the codebase. UnsupportedInput is sometimes used for input type-checks (as per the name!!), but *also* used for argument type-checks. TypeMismatch is also used for both. I thus devised the following standard: input type-checking *only* uses UnsupportedInput, and argument type-checking *only* uses TypeMismatch. Moreover, to differentiate them, UnsupportedInput now has *two* error arrows (spans), one pointing at the command and the other at the input origin, while TypeMismatch only has the one (because the command should always be nearby) * In order to apply that standard, a very large number of UnsupportedInput uses were changed so that the input's span could be retrieved and delivered to it. * Additionally, I noticed many places where **errors are not propagated correctly**: there are lots of `match` sites which take a Value::Error, then throw it away and replace it with a new Value::Error with less/misleading information (such as reporting the error as an "incorrect type"). I believe that the earliest errors are the most important, and should always be propagated where possible. * Also, to standardise one broad subset of UnsupportedInput error messages, who all used slightly different wordings of "expected `<type>`, got `<type>`", I created OnlySupportsThisInputType as a variant of it. * Finally, a bunch of error sites that had "repeated spans" - i.e. where an error expected two spans, but `call.head` was given for both - were fixed to use different spans. # Example BEFORE ``` 〉20b | str starts-with 'a' Error: nu:🐚:unsupported_input (link) × Unsupported input ╭─[entry #31:1:1] 1 │ 20b | str starts-with 'a' · ┬ · ╰── Input's type is filesize. This command only works with strings. ╰──── 〉'a' | math cos Error: nu:🐚:unsupported_input (link) × Unsupported input ╭─[entry #33:1:1] 1 │ 'a' | math cos · ─┬─ · ╰── Only numerical values are supported, input type: String ╰──── 〉0x[12] | encode utf8 Error: nu:🐚:unsupported_input (link) × Unsupported input ╭─[entry #38:1:1] 1 │ 0x[12] | encode utf8 · ───┬── · ╰── non-string input ╰──── ``` AFTER ``` 〉20b | str starts-with 'a' Error: nu:🐚:pipeline_mismatch (link) × Pipeline mismatch. ╭─[entry #1:1:1] 1 │ 20b | str starts-with 'a' · ┬ ───────┬─────── · │ ╰── only string input data is supported · ╰── input type: filesize ╰──── 〉'a' | math cos Error: nu:🐚:pipeline_mismatch (link) × Pipeline mismatch. ╭─[entry #2:1:1] 1 │ 'a' | math cos · ─┬─ ────┬─── · │ ╰── only numeric input data is supported · ╰── input type: string ╰──── 〉0x[12] | encode utf8 Error: nu:🐚:pipeline_mismatch (link) × Pipeline mismatch. ╭─[entry #3:1:1] 1 │ 0x[12] | encode utf8 · ───┬── ───┬── · │ ╰── only string input data is supported · ╰── input type: binary ╰──── ``` # User-Facing Changes Various error messages suddenly make more sense (i.e. have two arrows instead of one). # Tests + Formatting Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass # After Submitting If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date.
69 lines
1.5 KiB
Rust
69 lines
1.5 KiB
Rust
use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
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use nu_test_support::playground::Playground;
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use nu_test_support::{nu, pipeline};
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#[test]
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fn rows() {
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Playground::setup("take_test_1", |dirs, sandbox| {
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sandbox.with_files(vec![FileWithContentToBeTrimmed(
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"caballeros.csv",
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r#"
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name,lucky_code
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Andrés,1
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Jonathan,1
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Jason,2
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Yehuda,1
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"#,
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)]);
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let actual = nu!(
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cwd: dirs.test(), pipeline(
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r#"
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open caballeros.csv
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| take 3
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| get lucky_code
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| math sum
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"#
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));
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assert_eq!(actual.out, "4");
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})
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}
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#[test]
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fn rows_with_no_arguments_should_lead_to_error() {
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Playground::setup("take_test_2", |dirs, _sandbox| {
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let actual = nu!(
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cwd: dirs.test(), pipeline(
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r#"[1 2 3] | take"#
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));
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assert!(actual.err.contains("missing_positional"));
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})
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}
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#[test]
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fn fails_on_string() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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"foo bar" | take 2
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"#
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));
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assert!(actual.err.contains("pipeline_mismatch"));
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}
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#[test]
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// covers a situation where `take` used to behave strangely on list<binary> input
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fn works_with_binary_list() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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([0x[01 11]] | take 1 | get 0) == 0x[01 11]
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"#
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));
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assert_eq!(actual.out, "true");
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}
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